REF: use BlockManager.apply for Rolling.count (#35883)
REF: use BlockManager.apply for Rolling.count (#35883)

* REF: remove unnecesary try/except

* TST: add test for agg on ordered categorical cols (#35630)

* TST: resample does not yield empty groups (#10603) (#35799)

* revert accidental rebase

* REF: use BlockManager.apply for Rolling.count

Co-authored-by: Karthik Mathur <d78eb1df3d2d8b4ea5cbf69dbb75db83a558848f@users.noreply.github.com>
Co-authored-by: tkmz-n <92421631b606444abbe70499c596c52139ff5cd3@users.noreply.github.com>
gfyoung/pandas,datapythonista/pandas,pandas-dev/pandas,jreback/pandas,pandas-dev/pandas,jorisvandenbossche/pandas,gfyoung/pandas,datapythonista/pandas,jreback/pandas,rs2/pandas,pandas-dev/pandas,jorisvandenbossche/pandas,jorisvandenbossche/pandas,datapythonista/pandas,dsm054/pandas,dsm054/pandas,pandas-dev/pandas,gfyoung/pandas,dsm054/pandas,jreback/pandas,gfyoung/pandas,rs2/pandas,rs2/pandas,gfyoung/pandas,datapythonista/pandas,rs2/pandas,jreback/pandas,jreback/pandas,dsm054/pandas,dsm054/pandas,jorisvandenbossche/pandas